Number Base Converter

Popular

Convert numbers between binary, decimal, hexadecimal, octal, and any base from 2 to 36 with live updates.

Signed (two's complement)Uppercase A-F

Bit length

Binary (base 2)

Octal (base 8)

Decimal (base 10)

Hexadecimal (base 16)

Custom base

Quick Reference (0–15)

1

Type in any field

Enter a number into the binary, octal, decimal, hex, or custom-base field. All other fields update instantly.
2

Adjust settings

Toggle signed mode for negative numbers, select bit length, or enter a custom base (2-36).
3

Copy the result

Click the copy button next to any field to copy that representation to your clipboard.

How do I convert binary to decimal?

Enter the binary number in the Binary field and read the result in the Decimal field. For example, 1010 in binary is 10 in decimal.

What bases are supported?

Binary (2), octal (8), decimal (10), hexadecimal (16), and any custom base from 2 to 36.

How does signed mode work?

Signed mode uses two's complement representation. The most significant bit indicates the sign.

Is any data sent to a server?

No. All conversions happen entirely in your browser.

Convert numbers instantly between number bases. Enter a value in any

field and all other fields update in real time. Supports binary, octal,

decimal, hexadecimal, and any custom base from 2 to 36. Toggle signed

mode for two's-complement representation and select bit length. Binary

output is grouped into nibbles for readability. All processing runs in

your browser — nothing is sent to a server.

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